Fire-door.



No. 802,709. PATENTED OOT. 24, 1905.I A. C. PREBLE.

PIRE DOOR.

APPLICATION PILIEDl JUNE 30,1905.

PATENT OlllIHIItlll",

Fine-noce..

lilo. 802,709.

Specieation of Letters Patent.

Patented Oct. 24, 1905.

Application filed June 30, 1905. Serial No. 267,705.

To (1,7/7/ 1,071,072?, t may concern.-

Be it known that I, ANDREW O. PREBLE, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented a new and usefulImprovement in Fire-Doors, of' which thefollowing is a specification.

My invention relates particularly to firedoors having vertically-movingseparable upper and lower sections; and my primary object is to provideimproved fire protection at the upper edge of the upper section and atthe lower edge of the lower section, thereby overcoming serious defectsin present construction.

My invention is illustrated in its preferred embodiment in theaccompanying drawings, in which" Figure l represents a broken verticalsection of a wall of an elevatoreshaft equipped with my improvedlire-door, and Fig. 2 a broken horizontal section taken as indicated atline 2 of' Fig. 1.

In the preferred construction A represents a wall of' an elevator-shaftA', B a door-opening, and C my improved door applied thereto. ',lhedoor-opening is surmounted by a lintel composed of I-beams and a meta]plate beneath the I-beams. The inner edge of the plate projects slightlybeyond the inner surlface if of the wall A and has supported thereon ahorizontal angle-bar b3, having a horizontal flange L" and a verticalAflange 7)". At the bottom of' the door-opening is the floor L", uponwhich is secured a sill-plate bl. The inner edge of the plate 7 projectsbeyond the inner edge of the wall A and has secured to it an angle-bar71, having a horizontal flange and a downturned vertical flange b1".Adjacent to the angle-bar is an angle-bar bu, having a downturned flange612, separated from the flange wby aspace l. At the sides of the doorare provided the usual vertical guides t for the lateral edges of thedoor.

rlhe door O comprises an upper section O and a lower section O, whichare vertically movable in the guides bu. In practice the door-sectionsare connected with each other in a well-known manner to counterbalanceeach other. The upper door-section C is preferably formed ofcorrugated'sheet metal c, which has connected Vwith its lateral edgesangles c, (one shown,) with which are conuected angles c, having flangesengaging the guides o, The lower edge of the upper door-section isequipped with an angle c, with which is connected a bar c". The lowerdoor-section is similarly formed and connected with the guides L and hasat its upper edge an angle c5, which slidably engages the dependingportion of' the bar c", forming the usual lireproof joint at the meetingedges of the door-sections. The upper section is equipped at its upperend with an angle-bar c, which has a horizontal llange c7 turned towardthe elevator-shaft. Secured upon the flange c7 is an angle es, having adownturned flange ci), which when the door is closed hooks over theflange b5 of the angle b. The lower door-section is equipped at itslower edge with an angle-bar el, having' a horizontal flange with whichis connected an angle-bar cu, having an upturnedflange el, which hooksunder the flange b1 of' the angle-bar 5S.

From the foregoing description it will be understood that when thedoor-sections are closed lireproof' joints are afforded at the upper andlower edges of the upper and lower door-sections, respectively, as wellas at the lateral edges and the meeting edges of' the door-sections. Itis understood, of course, that when the upper door-section is raised thelower door-section is lowered in opening the door.

What I regard as new, and desire to secure by Letters Patent, isn

il. The combination with a wall. having a door-opening and verticalguides at the sides of said opening', ol vertically-movable upper andlower doorsections movable in .said guides, a member connected with theupper edge portion of' the upper door-section bearing a downturnedflange, a stationary member at the upper portion of the door-openinghaving an upturned flange over which said lrst-named flange hooks, amember connected with the lower edge portion of the lower doorsectionhaving an upturned flange, and astationary member at the lower portionof the door-opening having' a downturned Aflange under which the flangeof said last-named mein* ber hooks, for the purpose set forth.

2. The combination with a wall having a door-opening and a lintel at itsupper portion equipped with a plate, of an angle-bar supported upon theinner edge portion of said plate and having an upturned flange, a vertically-rnovable upper door-section equipped IOO with zin anglo-harhavingzi downturnod 'flange of Said last-uzmiod anglo-bar, for thopurpose hooking over Said first-named flange, a Sillsot forth.

plate at the bottom of rho door-opening, an zin- ANDREV C. PREBLEglo-bar secured Lhereto having a downturned 5 flange, and nvertically-movable lower dooi ln presence of section equipped with ananglo-bar having' 1J. H EISLAR,

an upturned flange hooking under tho flange J. H. LANDES.

